| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be required for [adj] [noun sg] | 35 |
|
| 2 | is required for [adj] [noun] | 22 |
|
| 3 | be required for [adj] [noun pl] | 20 |
|
| 4 | are required for [adj] [noun] | 14 |
|
| 5 | be required for [adj] [noun] | 11 |
|
